/**
 * UNIKABIZ Design System - CSS Architecture
 * 
 * This file contains the complete CSS design system for UNIKABIZ.
 * Built for Tailwind CSS CDN usage with custom extensions.
 * 
 * TABLE OF CONTENTS:
 * 1. CSS Custom Properties (Design Tokens)
 * 2. Base Styles & Typography
 * 3. Layout Utilities
 * 4. Component Styles
 * 5. Animations & Transitions
 * 6. Utility Classes
 * 7. Responsive Overrides
 */

/* =============================================================================
   1. CSS CUSTOM PROPERTIES (DESIGN TOKENS)
   ============================================================================= */

:root {
  /* -------------------------------------------------------------------------
     COLOR PALETTE
     ------------------------------------------------------------------------- */
  
  /* Primary - Professional Blue (Trust, Technology) */
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;
  --color-primary-200: #bfdbfe;
  --color-primary-300: #93c5fd;
  --color-primary-400: #60a5fa;
  --color-primary-500: #3b82f6;
  --color-primary-600: #2563eb;
  --color-primary-700: #1d4ed8;
  --color-primary-800: #1e40af;
  --color-primary-900: #1e3a8a;
  
  /* Accent - Innovative Purple (AI, Future) */
  --color-accent-50: #faf5ff;
  --color-accent-100: #f3e8ff;
  --color-accent-200: #e9d5ff;
  --color-accent-300: #d8b4fe;
  --color-accent-400: #c084fc;
  --color-accent-500: #a855f7;
  --color-accent-600: #9333ea;
  --color-accent-700: #7c3aed;
  --color-accent-800: #6b21a8;
  --color-accent-900: #581c87;
  
  /* Success - Positive Metrics Green */
  --color-success-50: #f0fdf4;
  --color-success-100: #dcfce7;
  --color-success-200: #bbf7d0;
  --color-success-300: #86efac;
  --color-success-400: #4ade80;
  --color-success-500: #22c55e;
  --color-success-600: #16a34a;
  --color-success-700: #15803d;
  --color-success-800: #166534;
  --color-success-900: #14532d;
  
  /* Warning */
  --color-warning-50: #fffbeb;
  --color-warning-100: #fef3c7;
  --color-warning-500: #f59e0b;
  --color-warning-600: #d97706;
  
  /* Error */
  --color-error-50: #fef2f2;
  --color-error-100: #fee2e2;
  --color-error-500: #ef4444;
  --color-error-600: #dc2626;
  
  /* Neutrals */
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;
  
  /* -------------------------------------------------------------------------
     GRADIENTS
     ------------------------------------------------------------------------- */
  --gradient-primary: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-accent-600) 100%);
  --gradient-primary-hover: linear-gradient(135deg, var(--color-primary-700) 0%, var(--color-accent-700) 100%);
  --gradient-hero: linear-gradient(135deg, var(--color-gray-50) 0%, #ffffff 50%, var(--color-primary-50) 100%);
  --gradient-card-hover: linear-gradient(135deg, var(--color-primary-50) 0%, var(--color-accent-50) 100%);
  --gradient-success: linear-gradient(135deg, var(--color-success-500) 0%, var(--color-success-600) 100%);
  --gradient-text: linear-gradient(135deg, var(--color-primary-600) 0%, var(--color-accent-600) 100%);
  
  /* -------------------------------------------------------------------------
     TYPOGRAPHY
     ------------------------------------------------------------------------- */
  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  
  /* Font Sizes */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 1.875rem;
  --text-4xl: 2.25rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* Line Heights */
  --leading-tight: 1.25;
  --leading-snug: 1.375;
  --leading-normal: 1.5;
  --leading-relaxed: 1.625;
  
  /* -------------------------------------------------------------------------
     SPACING (8px Grid)
     ------------------------------------------------------------------------- */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  
  /* -------------------------------------------------------------------------
     BORDER RADIUS
     ------------------------------------------------------------------------- */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;
  
  /* -------------------------------------------------------------------------
     SHADOWS
     ------------------------------------------------------------------------- */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
  --shadow-primary: 0 8px 25px -5px rgba(37, 99, 235, 0.25);
  --shadow-primary-lg: 0 15px 35px -5px rgba(37, 99, 235, 0.4);
  --shadow-accent: 0 8px 25px -5px rgba(124, 58, 237, 0.25);
  
  /* -------------------------------------------------------------------------
     TRANSITIONS
     ------------------------------------------------------------------------- */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* -------------------------------------------------------------------------
     LAYOUT
     ------------------------------------------------------------------------- */
  --max-width-prose: 65ch;
  --max-width-content: 80rem;
  --header-height: 5rem;
  --header-height-mobile: 4rem;
}

/* Dark mode overrides (future use) */
@media (prefers-color-scheme: dark) {
  :root.dark-mode {
    --color-gray-50: #111827;
    --color-gray-100: #1f2937;
    --color-gray-800: #f3f4f6;
    --color-gray-900: #f9fafb;
  }
}

/* =============================================================================
   2. BASE STYLES & TYPOGRAPHY
   ============================================================================= */

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-gray-900);
  background-color: #ffffff;
}

/* Typography Scale */
.font-display {
  font-family: var(--font-display);
}

.font-sans {
  font-family: var(--font-sans);
}

.font-mono {
  font-family: var(--font-mono);
}

/* Heading Styles */
h1, .h1 {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
}

h2, .h2 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: var(--leading-tight);
  letter-spacing: -0.025em;
}

h3, .h3 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: var(--leading-snug);
}

h4, .h4 {
  font-size: var(--text-xl);
  font-weight: 600;
  line-height: var(--leading-snug);
}

h5, .h5 {
  font-size: var(--text-lg);
  font-weight: 600;
  line-height: var(--leading-normal);
}

h6, .h6 {
  font-size: var(--text-base);
  font-weight: 600;
  line-height: var(--leading-normal);
}

/* Responsive typography */
@media (min-width: 640px) {
  h1, .h1 { font-size: var(--text-5xl); }
  h2, .h2 { font-size: var(--text-4xl); }
  h3, .h3 { font-size: var(--text-3xl); }
}

@media (min-width: 1024px) {
  h1, .h1 { font-size: var(--text-6xl); }
  h2, .h2 { font-size: var(--text-5xl); }
}

/* Gradient text */
.text-gradient {
  background: var(--gradient-text);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Prose content */
.prose {
  max-width: var(--max-width-prose);
}

.prose p {
  margin-bottom: var(--space-4);
}

.prose ul, .prose ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

.prose li {
  margin-bottom: var(--space-2);
}

.prose a {
  color: var(--color-primary-600);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.prose a:hover {
  color: var(--color-primary-700);
}

/* =============================================================================
   3. LAYOUT UTILITIES
   ============================================================================= */

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width-content);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--space-6);
    padding-right: var(--space-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--space-8);
    padding-right: var(--space-8);
  }
}

/* Section spacing */
.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}

@media (min-width: 640px) {
  .section {
    padding-top: var(--space-20);
    padding-bottom: var(--space-20);
  }
}

@media (min-width: 1024px) {
  .section {
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
  }
}

/* Grid layouts */
.grid-services {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid-services {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-services {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
  }
}

.grid-testimonials {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: 1fr;
}

@media (min-width: 768px) {
  .grid-testimonials {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .grid-testimonials {
    grid-template-columns: repeat(3, 1fr);
  }
}

.grid-stats {
  display: grid;
  gap: var(--space-6);
  grid-template-columns: repeat(2, 1fr);
}

@media (min-width: 1024px) {
  .grid-stats {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-8);
  }
}

/* =============================================================================
   4. COMPONENT STYLES
   ============================================================================= */

/* -------------------------------------------------------------------------
   BUTTONS
   ------------------------------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  border-radius: var(--radius-xl);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
  text-decoration: none;
}

.btn:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

/* Button Sizes */
.btn-xs { padding: 0.375rem 0.75rem; font-size: var(--text-xs); }
.btn-sm { padding: 0.5rem 1rem; font-size: var(--text-sm); }
.btn-md { padding: 0.625rem 1.25rem; font-size: var(--text-sm); }
.btn-lg { padding: 0.75rem 1.5rem; font-size: var(--text-base); }
.btn-xl { padding: 1rem 2rem; font-size: var(--text-lg); }

/* Button Variants */
.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
  background: var(--gradient-primary-hover);
  box-shadow: var(--shadow-primary-lg);
  transform: translateY(-2px) scale(1.02);
}

.btn-secondary {
  background: white;
  color: var(--color-gray-700);
  border: 2px solid var(--color-gray-200);
}

.btn-secondary:hover {
  border-color: var(--color-primary-300);
  color: var(--color-primary-600);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-gray-600);
}

.btn-ghost:hover {
  background: var(--color-gray-100);
  color: var(--color-gray-900);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary-600);
  border: 2px solid var(--color-primary-200);
}

.btn-outline:hover {
  background: var(--color-primary-50);
  border-color: var(--color-primary-300);
}

.btn-success {
  background: var(--gradient-success);
  color: white;
  box-shadow: 0 8px 25px -5px rgba(34, 197, 94, 0.25);
}

/* Button Icon */
.btn i {
  margin-right: 0.5rem;
}

.btn-icon-right i {
  margin-right: 0;
  margin-left: 0.5rem;
}

/* -------------------------------------------------------------------------
   CARDS
   ------------------------------------------------------------------------- */

.card {
  background: white;
  border-radius: var(--radius-2xl);
  transition: all var(--transition-slow);
}

.card-elevated {
  box-shadow: var(--shadow-lg);
}

.card-elevated:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-4px);
}

.card-bordered {
  border: 1px solid var(--color-gray-200);
}

.card-bordered:hover {
  border-color: var(--color-primary-200);
  box-shadow: var(--shadow-lg);
}

.card-gradient {
  background: linear-gradient(135deg, white 0%, var(--color-gray-50) 100%);
}

.card-p-sm { padding: var(--space-4); }
.card-p-md { padding: var(--space-6); }
.card-p-lg { padding: var(--space-8); }

/* Service Card */
.service-card {
  display: block;
  text-decoration: none;
  color: inherit;
}

.service-card .icon-wrapper {
  width: 3.5rem;
  height: 3.5rem;
  background: linear-gradient(135deg, var(--color-primary-100) 0%, var(--color-accent-100) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-5);
  transition: all var(--transition-slow);
}

.service-card:hover .icon-wrapper {
  background: var(--gradient-primary);
}

.service-card .icon-wrapper i {
  font-size: 1.5rem;
  color: var(--color-primary-600);
  transition: color var(--transition-slow);
}

.service-card:hover .icon-wrapper i {
  color: white;
}

.service-card h3 {
  transition: color var(--transition-normal);
}

.service-card:hover h3 {
  color: var(--color-primary-600);
}

/* Testimonial Card */
.testimonial-card {
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: var(--space-4);
  right: var(--space-6);
  font-family: Georgia, serif;
  font-size: 4rem;
  line-height: 1;
  color: var(--color-primary-100);
}

.testimonial-card .stars {
  display: flex;
  gap: 0.25rem;
  margin-bottom: var(--space-4);
}

.testimonial-card .stars i {
  color: var(--color-warning-400);
}

.testimonial-card .stars i.empty {
  color: var(--color-gray-200);
}

/* Metric Card */
.metric-card {
  text-align: center;
  padding: var(--space-6);
}

.metric-card .value {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-gray-900);
  margin-bottom: var(--space-1);
}

.metric-card .label {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

/* -------------------------------------------------------------------------
   FORMS
   ------------------------------------------------------------------------- */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-gray-700);
  margin-bottom: var(--space-2);
}

.form-label .required {
  color: var(--color-error-500);
  margin-left: 0.25rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  font-size: var(--text-base);
  border: 2px solid var(--color-gray-200);
  border-radius: var(--radius-xl);
  background: white;
  transition: all var(--transition-normal);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
  border-color: var(--color-gray-300);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary-500);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-input.error,
.form-select.error,
.form-textarea.error {
  border-color: var(--color-error-300);
  background: var(--color-error-50);
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
  border-color: var(--color-error-500);
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%239ca3af'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'%3E%3C/path%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1.25rem;
  padding-right: 3rem;
}

.form-hint {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
  margin-top: var(--space-1);
}

.form-error {
  font-size: var(--text-sm);
  color: var(--color-error-600);
  margin-top: var(--space-1);
  display: flex;
  align-items: center;
}

.form-error i {
  margin-right: 0.5rem;
}

/* Input with icon */
.input-with-icon {
  position: relative;
}

.input-with-icon .icon {
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-gray-400);
}

.input-with-icon .form-input {
  padding-left: 3rem;
}

/* -------------------------------------------------------------------------
   NAVIGATION
   ------------------------------------------------------------------------- */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-gray-100);
  transition: all var(--transition-slow);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar-inner {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height-mobile);
}

@media (min-width: 1024px) {
  .navbar-inner {
    height: var(--header-height);
    padding: 0 var(--space-8);
  }
}

/* Logo */
.navbar-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
}

.navbar-logo .logo-icon {
  width: 2.5rem;
  height: 2.5rem;
  background: var(--gradient-primary);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  transition: transform var(--transition-normal);
}

.navbar-logo:hover .logo-icon {
  transform: scale(1.05);
}

.navbar-logo .logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-gray-900);
}

/* Nav Links */
.nav-links {
  display: none;
  align-items: center;
  gap: var(--space-1);
}

@media (min-width: 1024px) {
  .nav-links {
    display: flex;
  }
}

.nav-link {
  padding: 0.5rem 1rem;
  font-weight: 500;
  color: var(--color-gray-600);
  text-decoration: none;
  transition: color var(--transition-normal);
}

.nav-link:hover {
  color: var(--color-primary-600);
}

/* Dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-trigger {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.nav-dropdown-trigger i {
  font-size: 0.75rem;
  transition: transform var(--transition-normal);
}

.nav-dropdown:hover .nav-dropdown-trigger i {
  transform: rotate(180deg);
}

.nav-dropdown-content {
  position: absolute;
  top: 100%;
  left: 0;
  padding-top: var(--space-2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all var(--transition-normal);
}

.nav-dropdown:hover .nav-dropdown-content {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-menu {
  background: white;
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--color-gray-100);
  padding: var(--space-6);
  min-width: 280px;
}

.nav-dropdown-menu.mega {
  min-width: 500px;
}

.nav-dropdown-item {
  display: flex;
  align-items: flex-start;
  padding: var(--space-3);
  border-radius: var(--radius-xl);
  text-decoration: none;
  color: inherit;
  transition: background var(--transition-normal);
}

.nav-dropdown-item:hover {
  background: var(--color-gray-50);
}

.nav-dropdown-item .item-icon {
  width: 2.5rem;
  height: 2.5rem;
  background: linear-gradient(135deg, var(--color-primary-100), var(--color-accent-100));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: var(--space-3);
  transition: all var(--transition-normal);
}

.nav-dropdown-item:hover .item-icon {
  background: var(--gradient-primary);
}

.nav-dropdown-item .item-icon i {
  color: var(--color-primary-600);
  transition: color var(--transition-normal);
}

.nav-dropdown-item:hover .item-icon i {
  color: white;
}

.nav-dropdown-item .item-title {
  font-weight: 600;
  color: var(--color-gray-900);
  transition: color var(--transition-normal);
}

.nav-dropdown-item:hover .item-title {
  color: var(--color-primary-600);
}

.nav-dropdown-item .item-desc {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
}

/* Mobile Menu Button */
.mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius-lg);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background var(--transition-normal);
}

.mobile-menu-btn:hover {
  background: var(--color-gray-100);
}

.mobile-menu-btn i {
  font-size: 1.25rem;
  color: var(--color-gray-700);
}

@media (min-width: 1024px) {
  .mobile-menu-btn {
    display: none;
  }
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  background: white;
  border-top: 1px solid var(--color-gray-100);
  max-height: 80vh;
  overflow-y: auto;
}

.mobile-menu.open {
  display: block;
}

@media (min-width: 1024px) {
  .mobile-menu {
    display: none !important;
  }
}

.mobile-accordion {
  border-bottom: 1px solid var(--color-gray-100);
}

.mobile-accordion-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4);
  font-weight: 600;
  color: var(--color-gray-900);
  background: none;
  border: none;
  cursor: pointer;
}

.mobile-accordion-trigger i {
  color: var(--color-gray-400);
  transition: transform var(--transition-normal);
}

.mobile-accordion.open .mobile-accordion-trigger i {
  transform: rotate(180deg);
}

.mobile-accordion-content {
  display: none;
  padding: 0 var(--space-4) var(--space-4);
}

.mobile-accordion.open .mobile-accordion-content {
  display: block;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  padding: var(--space-3);
  color: var(--color-gray-600);
  text-decoration: none;
  transition: color var(--transition-normal);
}

.mobile-nav-link:hover {
  color: var(--color-primary-600);
}

.mobile-nav-link i {
  width: 1.25rem;
  margin-right: var(--space-3);
  color: var(--color-primary-500);
}

/* -------------------------------------------------------------------------
   BADGES
   ------------------------------------------------------------------------- */

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-size: var(--text-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
}

.badge i {
  margin-right: 0.375rem;
}

.badge-default { background: var(--color-gray-100); color: var(--color-gray-700); }
.badge-primary { background: var(--color-primary-100); color: var(--color-primary-700); }
.badge-success { background: var(--color-success-100); color: var(--color-success-700); }
.badge-warning { background: var(--color-warning-100); color: var(--color-warning-600); }
.badge-error { background: var(--color-error-100); color: var(--color-error-600); }

/* -------------------------------------------------------------------------
   ALERTS
   ------------------------------------------------------------------------- */

.alert {
  padding: var(--space-4);
  border-radius: var(--radius-xl);
  border: 1px solid;
  display: flex;
  align-items: flex-start;
}

.alert i:first-child {
  margin-right: var(--space-3);
  margin-top: 0.125rem;
}

.alert-info {
  background: var(--color-primary-50);
  border-color: var(--color-primary-200);
  color: var(--color-primary-800);
}

.alert-success {
  background: var(--color-success-50);
  border-color: var(--color-success-200);
  color: var(--color-success-800);
}

.alert-warning {
  background: var(--color-warning-50);
  border-color: var(--color-warning-100);
  color: var(--color-warning-600);
}

.alert-error {
  background: var(--color-error-50);
  border-color: var(--color-error-200);
  color: var(--color-error-800);
}

/* -------------------------------------------------------------------------
   CTA SECTION
   ------------------------------------------------------------------------- */

.cta-section {
  background: var(--gradient-primary);
  padding: var(--space-16) var(--space-4);
  text-align: center;
  color: white;
}

.cta-section h2 {
  color: white;
  margin-bottom: var(--space-4);
}

.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--space-8);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.cta-section .btn-secondary {
  background: white;
  color: var(--color-primary-600);
  border-color: white;
}

.cta-section .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.9);
}

.cta-section .btn-ghost {
  color: white;
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.cta-section .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
}

/* -------------------------------------------------------------------------
   FOOTER
   ------------------------------------------------------------------------- */

.footer {
  background: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--space-16) 0 var(--space-8);
}

.footer a {
  color: var(--color-gray-300);
  text-decoration: none;
  transition: color var(--transition-normal);
}

.footer a:hover {
  color: white;
}

.footer-heading {
  color: white;
  font-weight: 600;
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-4);
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-3);
}

.footer-social {
  display: flex;
  gap: var(--space-3);
}

.footer-social a {
  width: 2.5rem;
  height: 2.5rem;
  background: var(--color-gray-800);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-normal);
}

.footer-social a:hover {
  background: var(--gradient-primary);
}

.footer-bottom {
  border-top: 1px solid var(--color-gray-800);
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  align-items: center;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* =============================================================================
   5. ANIMATIONS & TRANSITIONS
   ============================================================================= */

/* Keyframe Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(20px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

@keyframes countUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Animation Classes */
.animate-fade-in { animation: fadeIn 0.5s ease-out; }
.animate-fade-in-up { animation: fadeInUp 0.5s ease-out; }
.animate-fade-in-down { animation: fadeInDown 0.5s ease-out; }
.animate-slide-left { animation: slideInLeft 0.5s ease-out; }
.animate-slide-right { animation: slideInRight 0.5s ease-out; }
.animate-scale-in { animation: scaleIn 0.3s ease-out; }
.animate-float { animation: float 6s ease-in-out infinite; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-spin { animation: spin 1s linear infinite; }
.animate-shimmer { animation: shimmer 2s linear infinite; }

/* Animation Delays */
.delay-100 { animation-delay: 100ms; }
.delay-200 { animation-delay: 200ms; }
.delay-300 { animation-delay: 300ms; }
.delay-400 { animation-delay: 400ms; }
.delay-500 { animation-delay: 500ms; }

/* Scroll-triggered animations */
.scroll-animate {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.scroll-animate.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  .scroll-animate {
    opacity: 1;
    transform: none;
  }
}

/* =============================================================================
   6. UTILITY CLASSES
   ============================================================================= */

/* Backgrounds */
.bg-gradient-primary { background: var(--gradient-primary); }
.bg-gradient-hero { background: var(--gradient-hero); }
.bg-gradient-card { background: var(--gradient-card-hover); }

/* Text Colors */
.text-primary { color: var(--color-primary-600); }
.text-accent { color: var(--color-accent-600); }
.text-success { color: var(--color-success-600); }
.text-muted { color: var(--color-gray-500); }

/* Shadows */
.shadow-primary { box-shadow: var(--shadow-primary); }
.shadow-primary-lg { box-shadow: var(--shadow-primary-lg); }
.shadow-accent { box-shadow: var(--shadow-accent); }

/* Borders */
.border-gradient {
  border: 2px solid transparent;
  background: linear-gradient(white, white) padding-box,
              var(--gradient-primary) border-box;
}

/* Glassmorphism */
.glass {
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

/* Hover Effects */
.hover-lift {
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.hover-lift:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}

.hover-scale {
  transition: transform var(--transition-normal);
}

.hover-scale:hover {
  transform: scale(1.02);
}

/* Loading Skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--color-gray-200) 25%, var(--color-gray-100) 50%, var(--color-gray-200) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-md);
}

.skeleton-text {
  height: 1em;
  margin-bottom: 0.5em;
}

.skeleton-heading {
  height: 1.5em;
  width: 60%;
  margin-bottom: 1em;
}

.skeleton-avatar {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
}

/* Truncation */
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.line-clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Focus Ring */
.focus-ring:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
}

/* Screen Reader Only */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* =============================================================================
   7. RESPONSIVE OVERRIDES
   ============================================================================= */

/* Hide on mobile */
.hide-mobile {
  display: none;
}

@media (min-width: 768px) {
  .hide-mobile {
    display: block;
  }
}

/* Hide on desktop */
.hide-desktop {
  display: block;
}

@media (min-width: 1024px) {
  .hide-desktop {
    display: none;
  }
}

/* Stack on mobile */
.stack-mobile {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

@media (min-width: 768px) {
  .stack-mobile {
    flex-direction: row;
  }
}

/* Responsive text alignment */
.text-center-mobile {
  text-align: center;
}

@media (min-width: 768px) {
  .text-center-mobile {
    text-align: left;
  }
}

/* Print styles */
@media print {
  .no-print {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  a {
    text-decoration: underline;
  }
  
  .navbar, .footer {
    display: none;
  }
}